Improvement in car-roofs



UNITED STATES NATHANIEL 0. DAY, OF NASHUA, NEW HAMPSHIRE.

IMPROVEMENT IN CAR-ROOFS.

Specification forming part of Letters Patent No. 129,215, dated July 16,1872.

To all persons to whom these presents may come:

Be it known that I, NATHANIEL 0. DAY, of Nashua, of the county ofHillsborough, of the State of New Hampshire, have invented a new anduseful Improvement in Railway Carriages; and do hereby declare the sameto be fully described in the following specification and represented inthe accompanying drawing, of which Figure 1 is a side elevation, Fig. 2an end view, and Fig. 3 a longitudinal section, of a carriage-body withmy invention.

In carrying out my said invention I combine with the carriage-body andarrange above and a short distance from its top or roof what I term asunguard or auxiliary roof, which may, at its ends and sides or otherparts, be supported on or by posts or standards erected on the top orroof of said body, such guard being a thin wooden or metallic cap toextend entirely over the roof of the carriage, and with an openair-space between the two for the air to circulate in or through.

Railway carriages, by exposure to the rays of the sun, are liable tobecome very much heated, and, as a consequence, to heat the air withinthem, very frequently to the inconvenience or discomfort of passengersas well as to the injury of freight or live stock when within suchcarriages.

I have found that, by constructing a railway carriage with an auxiliaryroof raised over the main roof and open at the ends or sides, or at theends and sides of the carriage, so that air may freely enter within andpass out from the space between the main and auxiliary roofs, thedifliculty experienced by heating the main roof will be avoided-in otherwords, that it will be protected by the auxiliary roof or sunguard andthe air-space between the two, so that the heat absorbed by the guardwill be obstructed by the air which will pass into and out of theair-space, especially when the carriage may be in movement.

To facilitate the inrush of air into the airspace, and also to protectthe door of the carriage from rain, I apply to each end an inclineddeflector, as shown in the drawing. When the carriage may be in rapidmotion the deflector will cause a larger volume of air to pass into andthrough the airspace under the sunguard, and thereby operate to preventthe lodgment of any sparks or cinders or dust upon the main roof.

In the drawing, A denotes the car-body; B, the sun-guard; G, theair-space between the latter and the roof a of the carriage. D is theinclined deflector, and b b b are the posts or standards for supportingthe sun-guard or auxiliary roof.

I make no claim to anything shown or described in either of the UnitedStates patents 61,482 and 67,894, as in carrying out my inventionthe'auxiliary roof or the space between it and the main roof of thecarriage must be open at the ends, or at such and on the sides of thecarriage, in order to secure a proper flowage of air between the tworoofs and, furthermore, I so arrange the deflector D that it shallanswer not only as a root" for the platform of the carriage, but as ameans of deflectin g air into the passageG between the two roofs, thesame thereby improving the abstraction of heat from the sun-guard andmain roof.

I therefore claim- A railway carriage-body, A, provided with 7 theauxiliary roof or sun-guard B arranged over the main roof, as specified,and having the air-space 0 between the two open at its ends, or ends andsides, and provided with deflectorsD disposed over the end platforms andwith respect to such space 0, all substantially as hereinbeforeexplained.

NATHANIEL 0. DAY.

Witnesses R. H. EDDY,

J. R. Snow.

